| Seal Beach to Silver Firs (Washington) | 997.54 mi (1,605.38 km) |
| Seal Beach to Silver Spring (Maryland) | 2,292.59 mi (3,689.56 km) |
| Seal Beach to Silver Springs Shores (Florida) | 2,138.79 mi (3,442.05 km) |
| Seal Beach to Silverdale (Washington) | 990.64 mi (1,594.27 km) |
| Seal Beach to Silverton (Oregon) | 816.51 mi (1,314.05 km) |
| Seal Beach to Simi Valley (California) | 52.52 mi (84.52 km) |
| Seal Beach to Simpsonville (South Carolina) | 2,035.88 mi (3,276.43 km) |
| Seal Beach to Sioux City (Iowa) | 1,318.90 mi (2,122.57 km) |
| Seal Beach to Sioux Falls (South Dakota) | 1,329.59 mi (2,139.76 km) |
| Seal Beach to Skokie (Illinois) | 1,739.13 mi (2,798.86 km) |
| Seal Beach to Sleepy Hollow (New York) | 2,450.66 mi (3,943.96 km) |
| Seal Beach to Slidell (Louisiana) | 1,669.07 mi (2,686.10 km) |
| Seal Beach to Smithfield (North Carolina) | 2,246.20 mi (3,614.91 km) |
| Seal Beach to Smithfield (Utah) | 653.75 mi (1,052.12 km) |
| Seal Beach to Smithville (Missouri) | 1,356.26 mi (2,182.70 km) |
